Hopefully, it will die of its own weight without formal repeal.
The House has already passed repeal this year. Senate repeal is unlikely until the Senate is in GOP hands which couldn't happen until 2015 at the earliest. Even then, assuming Zero vetoes repeal, it would take two-thirds of each house to override. So barring some fallout which would make Obamacare unpalatable to significant number of Democrats, formal repeal is unlikely until 2017 at the earliest.
In the meantime, there are still some opportunities for litigation and court rulings which could destroy it or at least significant parts of it.
the fact is that every day it is being more and more entrenched and without a full court press to get it off the books it will be with us forever. We need more action from Congress and the people to rid ourselves of this monster.